Extrinsic 4718-1

{
  "heartbeat": {
    "blockNumber": 4717,
    "sessionIndex": 78,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x4e1f44d9927aaaec87fd28e475d4c721ae95e7a8489f444da4d08c6aeb54fa2b9f1db12c5ff02aa3c2155c2e07234c2cde42a8e62d7a919fb0bae0e346823080"
}